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• May 12, 2020 Create Date
• May 12, 2020 Last Updated

A number of epoxy paste adhesives were evaluated as alternatives to Henkel’s EA 9320NA for aluminum bonding
applications that utilize a nylon pad/sol-gel surface preparation without bond primer. Paste adhesive is currently used in some noncritical aluminum bonding applications for which heating is difficult and bond primer cannot be used. The EA 9320NA exhibits several limitations, including relatively low lap shear strength at elevated temperature, marginal peel strength, and limited pot life once mixed. This report provides results of coupon testing, including environmental durability (wedge test), tensile lap shear, and floating roller peel. Henkel’s Hysol EA 9360 paste adhesive appeared to be the best overall candidate for replacing EA 9320NA by exhibiting good environmental
durability without EA 9320NA’s limitations.